Ask Honest John

Most recently answered fuel economy questions
Do you have a list of cars of any age that have the best miles per gallon for petrol with auto or manual transmission?
The new E10 petrol, that we must now use, do you get less miles per gallon out of it?
I have a 2019 Honda CRV 1.5 AWD with 11,000 miles, full service history and not due a service until May 2022. I had been averaging around 34/33 mpg until recently. My fuel economy has dropped to 28/26...
I've just bought a 2013 Ford Focus Estate 1.0-litre EcoBoost Titanium. It is giving me about 33mpg, when the advert for urban driving says it should be giving over 47mpg. On the motorway at 70mph it also...
I have a 15-plate Honda CR-V 1.6 diesel. I still want a diesel and like the elevated driving position but need something that will deliver mid 50's+ real mpg. The budget is £20k. What would you recommend?
Is there a rule of thumb about how much less efficient a plug-in hybrid is when the battery runs out compared to a combustion engine equivalent? For example, if a conventional petrol or diesel model did...
With the coming of electric vehicles, wouldn’t it be better to start referring to all vehicles economy as MP£ or Miles per Euro as standard rather than mpg? As an example, my Skoda Fabia Estate diesel...
Are the mpg figures for the Jaguar F-Pace petrol plug-in believable? How are they calculated?
Do you have a top 10 or similar of most economical cars? It would be nice to see a list that would have specific engines included, i.e. Ford Focus 1.5 diesel.
What motorhomes see the best fuel economy?